... : PU/NBR/VITON/SI/EPDM 3. TYPE: NOK/ VALQUA STANDA U RING(U RING/ PISTON & ROD SEAL) WHY CHOOSE US?1. NOK ... resistance d. Anti-aging, anti-radiation, good flexibility, good elasticity e. Excellent resistance of acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal ... , o ring, x ring, v ring, oil seal, wiper seal, u ring, rod seal, piston seal, rubber cord, etc. The molded ...